From fb9e9339876d0a7c4821f9dbea1635a43a06da01 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 20 Jan 2012 10:34:58 +0000 Subject: dri2proto: add prime protocol support. (v2.1) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit So we reserve bits 16->19 for offload device ids, this means we can have 6 offload devices, which is plenty for now, and we can bump this further later without fear. v2: I suck at maths, that is all. Fixed up the maths to match reality. v2.1: fix typo Reviewed-by: Michel Dänzer Reviewed-by: Kristian Høgsberg Signed-off-by: Dave Airlie --- dri2tokens.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/dri2tokens.h b/dri2tokens.h index 16c9008..bdca866 100644 --- a/dri2tokens.h +++ b/dri2tokens.h @@ -45,6 +45,11 @@ #define DRI2BufferDepthStencil 9 #define DRI2BufferHiz 10 +/* keep bits 16 and above for prime IDs */ +#define DRI2DriverPrimeMask 7 /* 0 - 7 - allows for 6 devices*/ +#define DRI2DriverPrimeShift 16 +#define DRI2DriverPrimeId(x) (((x) >> DRI2DriverPrimeShift) & (DRI2DriverPrimeMask)) + #define DRI2DriverDRI 0 #define DRI2DriverVDPAU 1 -- cgit v1.2.3